An image taken at 11:19 a.m. shows dark brown masses of people on the Mall. (GeoEye Satellite Image)
Members of the armed forces take part in inaugural parade. (Tracy A. Woodward/Post)
First family watches participants in the inaugural parade. (John McDonnell/Post)
The Army's Old Guard Fife and Drum Corps(军乐队的鼓笛队) march during the inaugural parade. (Nikki Kahn/Post)
President Obama addresses the crowd following his swearing-in. (Bloomberg)
Barack Obama becomes nation's 44th president. (Jonathan Newton/Post)
Barack Obama becomes nation's 44th president. (Jonathan Newton/Post)
President Obama and first lady Michelle Obama gesture during the inaugural parade. (AP)
Nearly two million people come to the Mall to watch the Obama inauguration. (Bill O'Leary/Post)
President Obama greets attendees after being sworn into office. (Bill O'Leary/Post)